reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel.git/commit/?id=a94253232b0454ae3f45e2a941bbc0a1d5bdb955
        git remote add geert-renesas-devel https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel.git
        git fetch --no-tags geert-renesas-devel renesas-dts-for-v6.14
        git checkout a94253232b0454ae3f45e2a941bbc0a1d5bdb955
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash dtbs_check